1021021211211 has 8 divisors (see below), whose sum is σ = 1394565556944. Its totient is φ = 664078836480.

The previous prime is 1021021211053. The next prime is 1021021211219. The reversal of 1021021211211 is 1121121201201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021021211211 - 2²³ = 1021012822603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021021211219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4150492606 + ... + 4150492851.

It is an arithmetic number, because the mean of its divisors is an integer number (174320694618).

Almost surely, 2^{1021021211211} is an apocalyptic number.

1021021211211 is a deficient number, since it is larger than the sum of its proper divisors (373544345733).

1021021211211 is an equidigital number, since it uses as much as digits as its factorization.

1021021211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300985501.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021021211211 its reverse (1121121201201), we get a palindrome (2142142412412).

The spelling of 1021021211211 in words is "one trillion, twenty-one billion, twenty-one million, two hundred eleven thousand, two hundred eleven".